<IfModule mod_rewrite.c>
RewriteEngine on

RewriteCond %{HTTPS} off
RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI} [R,L]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond $1 !^(index\.php|css|js|images|robots\.txt)
RewriteRule ^(.*)$ index.php?$1 [L]

</IfModule>